[root@localhost test]# cd /[root@localhost /]# lsbin  dev home  lib  media mydata proc run  srv tmp varboot etc japan lib64 mnt  opt   root sbin sys usr[root@localhost /]# ls /usrbin games  lib  libexec sbin  srcetc include lib64 local  share tmp[root@localhost /]# cd /dev[root@localhost dev]# lsautofs      mqueue       stdout tty35 tty63block      net         tty   tty36 tty7bsg       network_latency   tty0  tty37 tty8btrfs-control  network_throughput tty1  tty38 tty9bus       null        tty10  tty39 ttyS0cdrom      nvram        tty11  tty4  ttyS1char       oldmem       tty12  tty40 ttyS2console     port        tty13  tty41 ttyS3core       ppp         tty14  tty42 uhidcpu       ptmx        tty15  tty43 uinputcpu_dma_latency pts         tty16  tty44 urandomcrash      random       tty17  tty45 usbmon0disk       raw         tty18  tty46 usbmon1fd        rtc         tty19  tty47 vcsfull       rtc0        tty2  tty48 vcs1fuse       sda         tty20  tty49 vcs2hidraw0     sda1        tty21  tty5  vcs3hpet       sda2        tty22  tty50 vcs4hugepages    sda3        tty23  tty51 vcs5initctl     sda4        tty24  tty52 vcs6input      sda5        tty25  tty53 vcsakmsg       sda6        tty26  tty54 vcsa1log       sda7        tty27  tty55 vcsa2loop-control   sg0         tty28  tty56 vcsa3lp0       sg1         tty29  tty57 vcsa4lp1       shm         tty3  tty58 vcsa5lp2       snapshot      tty30  tty59 vcsa6lp3       snd         tty31  tty6  vfiomapper      sr0         tty32  tty60 vga_arbitermcelog      stderr       tty33  tty61 vhost-netmem       stdin        tty34  tty62 zero[root@localhost dev]# ls /libalsa    grub     kbd       sendmailbinfmt.d  java     kdump      sendmail.postfixcpp    java-1.5.0  kernel     sse2crda    java-1.6.0  locale     sysctl.dcups    java-1.7.0  modprobe.d   systemddebug   java-1.8.0  modules     tmpfiles.ddracut   java-ext   modules-load.d tunedfirewalld jvm     mozilla     udevfirmware  jvm-commmon polkit-1    udisks2games   jvm-exports python2.7    x86_64-redhat-linux6Egcc    jvm-private rpm       yum-plugins[root@localhost dev]# cd /[root@localhost /]# lsbin  dev home  lib  media mydata proc run  srv tmp varboot etc japan lib64 mnt  opt   root sbin sys usr